16 Questions
What is the function of compression in mammography?
To spread out the breast tissue and reduce its thickness, ensuring a more uniform image quality
How does breast tomosynthesis contribute to breast imaging?
Breast tomosynthesis provides three-dimensional images of the breast, allowing for better visualization and improved detection of abnormalities.
What is the main difference between conventional screen-film mammography and digital mammography procedure?
Conventional screen-film mammography uses film to capture the images, while digital mammography uses electronic detectors to capture and store the images.
Why do breast tissues intrinsically lack subject contrast in radiography?
Breast tissues lack subject contrast because they have similar effective atomic numbers and density, making it difficult to differentiate between them on a radiograph.
How does the subject contrast in conventional radiography differ from that in breast imaging?
In conventional radiography, subject contrast is great due to the large difference in mass density and atomic number among bone, muscle, fat, and lung tissue, whereas breast imaging faces the challenge of low subject contrast due to the similarity in effective atomic numbers and density of breast tissues.
What is the purpose of magnification in mammography?
Magnification helps to visualize small areas of interest in the breast with higher detail and clarity.
What is the major disadvantage of using low kVp technique in breast imaging?
High absorption of low energy x-rays in breast, contributing to patient dose
What is the purpose of compression in breast imaging?
Bring breast structure close to image receptor, improve visibility detail, and increase contrast
Why is compression important in breast imaging?
To reduce magnification, lessen geometric unsharpness, and increase resolution
What is the main benefit of using the geometric magnification technique in breast imaging?
To increase the size of the projected anatomic structures compared to the granularity of the image
What is the anode heel effect in mammography?
Radiation intensity near the chest wall must be higher than that to nipple area side
What are the radiological requirements for breast imaging in terms of details visualization?
Details possibly as fine as 50 μm must be adequately visualized
What is the purpose of the broad dynamic range in breast imaging?
It is required due to the composition of the breast and age-dependent changes in the breast
What is the scatter-to-primary exposure ratio for an uncompressed breast in mammography?
0.8
Why is the compression of the breast important in reducing radiation exposure?
It requires less kVp, reduces scattered radiation, and increases image contrast
What happens to the focus object distance in magnification mammography?
It is reduced
This quiz covers the imaging process in mammography, including topics such as compression, magnification, screen film mammography, digital mammography, and tomosynthesis. It aims to test the understanding of differentiating general radiography imaging from breast imaging using mammography and explaining the functions of compression and magnification in mammography.
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